16 Months New Character?

i ws wondering about the 16 months time lap and the i thought you were dead person
and well here are my opinions

1.its someone just 3 or 4 years older then clem she met and who tried everything to protect her just like lee think about it lees group just stayed for like 5 months alive so maybe in 16 months the person could be some sort of brother/sister for her

its obvious it can only be kenny OR crhista maybe its based on youre decisions if you ran away its only kenny and if you saved christa you met them both